He was born between 1014 and 1028 - the actual date is unknown.
Pope Gregory XI died on 1378-03-27.
Urban V
Pope Gregory XI (1370-78) Pope Urban VI (1378-89)
Pope Benedict XI was born in 1240.
Pope John XI was born in 910.
Pope Leo XI was born on June 2, 1535.
Pope Pius XI was born on May 31, 1857.
Pope Clement XI was born on July 23, 1649.
Pope Innocent XI was born on May 16, 1611.
Pope Gregory V was born in 972.
Pope Gregory X was born in 1210.
Pope Gregory XII was born in 1326.